How to use Log4j - single log file for 6 j2ee modules in a project

My requrement is to have a single, custom log file for one entire application. Using log4j.xml for config. I have logger put in an EJB utilility module, the same needs to be used in all other [java, ejb, web] modules in the EAR project.

Currnently log messages not written to this single logfile from all other modules.

I think what you're saying is that each component of the system has its own Log4J config file. You can also define a master Log4J config file in many J2EE appservers, which would make things easier to control, since there would be a single definition point instead of many.

Although even with multiple log4j configs, if they're all logging to the same file, I thought that the log messages would just concatenate to the file without conflict.

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